Compression Spring Co., Ltd. , http://www.nsspring.com
Second, the type of nutrition should be determined according to the weather conditions. In the weather, the photosynthesis is poor, the light in the greenhouse is insufficient, and the effect of spraying sugar or photosynthetic bacteria on the tomato leaf surface and titanium micro-fertilizer is better.
Third, the leaf surface sprays calcium fertilizer in time. The growth of tomato fruit requires more calcium, and the rainfall in the calcium-deficient area is large. When the soil is insufficient for calcium or a large amount of high-potassium and high-nitrogen compound fertilizer is applied, the fruit is prone to umbilical rot. Therefore, in the calcium-deficient area, calcium phosphate such as calcium phosphate, amino acid calcium, and calcium supplement should be sprayed during the tomato fruiting period to meet the tomato's demand for calcium.
Fourth, the time of tomato leaf fertilizer should be appropriate, to be sprayed in the evening or cloudy days with high air humidity. The suitable interval of tomato leaf spray fertilizer is 5-7 days, and the spraying time of organic nutrients can be appropriately shorter, generally about 5 days.
5. When the foliar fertilizer is used improperly, the leaves should be washed with clean water, the excess fertilizer should be washed away, and the water content of the leaves should be increased to alleviate the damage degree of the leaves. When the soil water content is insufficient, watering is also required to increase the water content in the plant and reduce the concentration of the fertilizer in the stems and leaves.
Sixth, the foliar fertilizer should be sprayed on the back of the leaf. Because the stomata and water holes of the tomato are mostly on the back of the leaf, the absorption rate of the leaf fertilizer sprayed on the back is high, and only the positive effect is not good.
Seven, foliar spray fertilizer is only an auxiliary means of base fertilizer, topdressing, is a supplement, can not replace the base fertilizer and top dressing.
Member of the newspaper expert Hu Yongjun
Source: Rural Volkswagen
Note on the fertilization of tomato leaf in greenhouse
First, the type of foliar nutrition should be determined according to the growth of tomato. Generally speaking, in the early stage of the results, the plant growth is relatively strong, and it is easy to grow. It is necessary to use foliar nutrition and nitrogen fertilizer to promote stem and leaf growth. Amino acid fertilizer, nucleotide fertilizer or potassium dihydrogen phosphate, NPK compound fertilizer can be used. At the peak of the period, the plant growth potential begins to weaken. Foliar fertilizers that promote the growth of stems and leaves should be used. Fertilizers containing alizarin or algae can be added with fertilizers containing various trace elements or mixed with 300 times of urea is sprayed together.
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